Clamping device

摘要

A clamping device for attachment of a movable carriage (50) to a laterally-ribbed drive belt (44) comprises a belt support plate (83) which houses a movable bar (85) carrying a pressure plate (86) biased to press the drive belt (44) against the belt support plate (83). At least one of the support plate (83) and pressure plate (86) have a notched surface (84) to receive the ribs of the drive belt (44). The movable bar (85) includes a wedge-shaped tongue (93) which is able to co-operate with a limit of travel means comprising a guide plate (47) and a roller bearing or ball bearing (49) for disengaging the clamping device, and thus the movable carriage (50), from the driving belt (44). The device provides for secure clamping to a movable drive belt (44) of a component which is required to make movements involving rapid acceleration and/or retardation, as in high speed photographic web cutting. The device further provides for quick release of said component from said movable drive belt (44) in the case of a limit travel position being passed, as in the case of retardation control failure.